Hi Michael,
For 11 years I’ve been in the Li battery business. We formerly designed and
installed over a hundred Li battery based systems, mostly mobile installations
but UPS and off-grid as well. Since 2018, we no longer do installations.
Currently we sell our own Li-ion brand with many
Choosing a higher insulation rating for the wire will increase current
capability, if that works in your case.
Larry Crutcher
Starlight Solar Power Systems
On Nov 8, 2023, at 10:06 AM, George McClellan via RE-wrenches
wrote:
Team;
With the move to larger cells, some modules have an Isc
Sorry Dan, I meant Ron.
On Oct 31, 2023, at 11:08 AM, Starlight via RE-wrenches
wrote:
Dan,
Since you are using 120Vac for the source, did you connect to just 1 AC input;
AC1 or AC2? You can not parallel same phase to both inputs or damage may
occur.
Have you measured the generator
Dan,
Since you are using 120Vac for the source, did you connect to just 1 AC input;
AC1 or AC2? You can not parallel same phase to both inputs or damage may
occur.
Have you measured the generator frequency and voltage at the inverter input?
Make sure to reduce the charge rate to 50% or less
I'm sold on Gigavac quality. I’m not sure if they have the AC coil option.
https://www.sensata.com/products/gigavac-power-contactors-fuses/gv-contactors
Larry Crutcher
Starlight Solar Power Systems
On Oct 3, 2023, at 12:05 PM, jay via RE-wrenches
wrote:
Hi All,
I’ve gotten approval from
Iota DLS converters can be stacked in series. Using 4 of the 90 Amp in series
will get you close.
Larry Crutcher
Starlight Solar Power Systems
On Sep 4, 2023, at 4:16 PM, Ron Young via RE-wrenches
wrote:
Hi All,
I am looking for recommendations for a standalone 48v high amp charger (min.
They did not anticipate the use with Lithium battery chemistry which is mostly
discharged at 12.7V, and that happens to be the fully charged resting voltage
of lead batteries.
Seems as though by now manufacturers should have increased the LBCO voltage
range in the software.
Larry Crutcher
You may already know but… Are your DC cables bonded together and twisted where
possible to reduce magnetic fields? Higher the current and greater the loop
area, the stronger the fields are. More parallel loops, the greater the
combined flux = loud Hums.
Larry Crutcher
Starlight Solar Power
That makes more sense, Darryl, thanks for sharing that. Another good example,
Jay.
We do have batteries that can be charged at 3C but I have only designed one
mobile medical unit with that capability. It required 2 50A shore power
connections or could use the onboard 20kW generator. Makes lots
Hi Jay,
For our LFMP and LFP batteries, it has never mattered.
As long as current is flowing, the SoC is increasing and the voltage will rise
until it reaches the CV set point.
Typically cell balance occurs when a cell voltage reaches a set point where a
load turns on across that cell.
? Thank you, Chris
On 5/15/2023 6:12 PM, Starlight via RE-wrenches wrote:
> Jay,
>
> I started recommending the Victron battery balancer for all series and
> series/parallel Li battery banks. It has eliminated trouble in some
> problematic systems. If you reach a cell over-voltage i
Jay,
I started recommending the Victron battery balancer for all series and
series/parallel Li battery banks. It has eliminated trouble in some problematic
systems. If you reach a cell over-voltage in the Kilovault BMS, it will block
current flow, preventing the other series batteries from
https://www.amazon.com/Solenoid-Control-Wireless-Contact-T-Mobile/dp/B07Q7PKW5Z?th=1
Larry Crutcher
Starlight Solar Power Systems
On Mar 13, 2023, at 12:47 PM, Jay via RE-wrenches
wrote:
Hi all
Any recommendations for a cell phone controlled relay?
Would be off grid. There is 12v already
Right Dave. The VooDoo of EMI filtering, lightning protection or EMP induced
voltage reduction attempts are similar and governed by the inverse square law.
How much energy and how close is it? You must properly reduce energy
propagation at every point. I have seen very expensive protection
To all techies, what if a bleeder resister, similar to what is used on a
capacitor, was in parallel with the PV strings or array? That should pull down
any high voltage from a low illuminance light source.
Larry Crutcher
Starlight Solar Power Systems
On Mar 8, 2023, at 2:13 PM, Darryl Thayer
Have you (or any) installed surge suppression on the PV input side to clamp the
open circuit voltage surge?
Larry Crutcher
Starlight Solar Power Systems
On Feb 1, 2023, at 1:23 PM, William Bryce via RE-wrenches
wrote:
I can also backup what Jim has said, and have seen the same gear
Hello Drake,
Since the relay board is functioning some times, I would more suspect (1) an
intermittent controller board or (2) corrosion on the contact area of the
header connection. They are relatively easy to change and not too expensive.
One thing I would test first is to unplug the ARC
Any new AC equipment connected and running during test? Scope the waveform
during equipment start to see if the distortion is severe. I have seen a 300W
load make a mess of a Magnum AC waveform.
Larry Crutcher
Starlight Solar Power Systems
On Jan 13, 2023, at 11:48 AM, Mac Lewis wrote:
Mac,
What was the lowest voltage measured at inverter battery terminals during the
inrush measurement?
Larry Crutcher
Starlight Solar Power Systems
On Jan 13, 2023, at 11:33 AM, Mac Lewis via RE-wrenches
wrote:
Hello Wrenches,
I have a new client that has ran a pretty decent wood shop
Perhaps this: https://jacobsschool.ucsd.edu/news/release?id=1094
Larry Crutcher
Starlight Solar Power Systems
On Aug 25, 2022, at 11:37 AM, Drake Chamberlin via RE-wrenches
wrote:
Hello Wrenches,
A client installed a beautiful white standing seam roof. Suddenly their air
conditioning
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